/*
 * jPOS Project [http://jpos.org]
 * Copyright (C) 2000-2015 Alejandro P. Revilla
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jpos.util;

import org.jpos.core.Configurable;
import org.jpos.core.Configuration;
import org.jpos.core.ConfigurationException;
import org.jpos.space.Space;
import org.jpos.space.SpaceError;
import org.jpos.space.SpaceFactory;
import org.jpos.space.TSpace;

public class SpaceLogListener implements LogListener, Configurable {
	String queueName;
	Space sp;
	Space buffer;
	long timeout = 300000L;
	boolean frozen = true;
	Configuration cfg;

	@SuppressWarnings("unused")
	public SpaceLogListener() {
		super();
	}

	@SuppressWarnings("unchecked")
	public synchronized LogEvent log(LogEvent ev) {
		LogEvent e = frozen ? new FrozenLogEvent(ev) : ev;
		try {
			getSpace().out(queueName, e, timeout);
			return null;
		} catch (Throwable t) {
			ev.addMessage("Unable to log to " + queueName);
			return ev;
		}
	}

	/**
	 * @param cfg Configuration object
	 * @throws ConfigurationException
	 */
	@Override
	public void setConfiguration(Configuration cfg) throws ConfigurationException {
		this.cfg = cfg;
		queueName = cfg.get("queue", null);
		if (queueName == null)
			throw new ConfigurationException("'queue' property not configured");

		timeout = cfg.getLong("timeout", timeout);
		frozen = cfg.getBoolean("frozen", true);
	}

	@SuppressWarnings("unchecked")
	private Space getSpace() {
		if (sp == null) {
			try {
				sp = SpaceFactory.getSpace(cfg.get("space"));
				if (buffer != null) {
					while (buffer.rdp(queueName) != null)
						sp.out(queueName, buffer.inp(queueName));
					buffer = null;
				}
			} catch (SpaceError e) {
				return (buffer = new TSpace());
			}
		}
		return sp;
	}
}
